Improvement in middlings-purifiers



UNITED STATES PATENT GEETCE,

WILLIAM Il. TODD AND EPHRAIM C. KEYSER, OF UTICA MILLS, MARYLAND.

IMPROVEMENT IN MIDDLINGS-PURIFIERS.

Speciiication forming part of Letters Patent No. 152,582, dated June 30, 1874; application nled May 5, 1874.

To all whom it may concern Beit known that we, WILLIAM El. TODD and EPHRAIM G. KEvsER, of Utica Mills, in thc county of Frederick and State ot' Maryland, have invented a new and Improved Middlings- Purifier; and we do hereby declare that the following is a full, clear, and exact description ofthe saine, reference being had to the accompanying drawing, forming a part ot' this specification, in which-- Figure lis a longitudinal sectional elevation; Fig. 2, an end view.

The invention relates to the purification of middlings. The means by' which we accomplish this object will first be fully described, andthen pointed out-'in the claim.

A in .the drawing represents the hopper into which the niiddlings are poured, and B the rotary wheel or roll by which they are gradually fed forward into a space, U. The latter leads upwardly to one or more zigzag channel-ways, D, having retarding projection d and pendent spout or pipe d thence, through a channel, E, to the suction-fan F, which discharges through its outlet j'. As the iniddlings are falling through space C upon the shaking or reciprocating inclined `sieve G, air is drawn by the suction-fan through opening c, and in the current carries up toward the fan the light niiddlings as well as impurities, the heavier parts being arrested at D d, and brought down to the sieve through pipe cl', while the refuse is discharged by the fan. As the middlings pass along the reciprocating sieve Gr, the fan draws through side openings H H a current of air, which courses upwardly through the sieve and carries other light particles through aperture I into chaunel J, and thence into the fan. Striking' against the wings of the latter, the heavier parts fall iiito a pocket, K, which is open at the bottom and allows them to drop upon the sieve. 'Ihe iniddlings pass through the sieve G into the chamber', in which is located the spiral conveyer M, while the tailings are discharged into a conductor, L, that leads to some suitable receptacle. The conveyor transfers the middlings to their destination in the usual manner. N is a lever for reciprocating the sieve, t'ulcrumed at a, and having a yoke, n. The latter is operated by a cam, p, on the drive shaft I. The shaft I lalso drives the shaft which contains the feedroll B by means ot' connecting pulleys and belt. Q is a striker, pivoted at q, and raised by an arm, r, of the shaft lt at each rotation of the latter. This striker at every blow jars the sieve and loosens the iniddlings that may have become lodged on the meshes of the sieve, thus serving to keep the interstices always open.

The combination, with sieve G and the hopper A, having feed-roll B, discharging into a space, C, having inlet c, of zigzag channels D E, having projection and spout d nl', the channelJ, having inlet I and pocket K, and the fan F, all constructed and arranged substantiall y as and for the purpose specified.

VILLIAM H. TODD. EPHRAIM C. KEYSER.

Witnesses SAM. D. R. THOMAS,

SAMUEL GLEM. 

